WO2016195288A1 - Adsorptive membrane - Google Patents

Abstract

The present invention relates to an adsorptive membrane characterized by comprising: a support member provided with a plurality of first pores; and a first adsorptive member which is laid on the support member, has a plurality of second pores, and is formed by accumulating ion-exchange nanofibers for adsorbing foreign substances.

Description

Adsorption membrane

The present invention relates to an adsorption membrane, and more particularly, to adsorb ionic foreign matter with an adsorption member in which ion-exchange nanofibers are accumulated, and to allow material adsorption by pores to improve adsorption efficiency and excellent antibacterial properties. The present invention relates to an adsorption membrane capable of obtaining properties.

Recently, due to the development of industry, rapid economic growth, population growth, urbanization, etc., various environmental problems have been caused by pollution sources.

That is, pollutants such as wastewater, heavy metals, dust and harmful gases are emitted from manufacturing plants, industrial facilities, living facilities, automobiles and motorcycles in various industries, thereby polluting air and water quality.

Such pollutants are obstacles to human life to live comfortably and healthyly, and various methods for purifying pollutants are being sought, and research and development for them are continuously continued in various ways.

One example technique for purifying contaminants is to filter contaminated gas or liquid through a membrane.

Membranes are capable of separating and filtering only certain components from gases, liquids, solids or mixtures thereof, and the mixture is filtered using the physicochemical properties of the membrane.

Membranes in the field of water treatment are classified into porous membranes, microporous membranes, and homogeneous membranes according to their structure, and are classified into microfiltration membranes, ultrafiltration membranes, reverse osmosis membranes, gas separation membranes, pervaporation membranes, and the like, depending on the use.

Among them, the polymer membrane is prepared by casting a polymer solution to form a sheet, and then depositing it in a solid phase. Polymeric membranes have been used in a wide range of membranes from microfiltration to gas permeation.

In Korean Laid-Open Patent Publication No. 2011-85096, a composite filter in which activated carbon fibers and ion exchange fibers are laminated on a side wall of a housing is proposed, but a disadvantage is that the size of the filter is large in the form of a composite filter.

Korean Patent Publication No. 507969 discloses a composite ion exchange filter in the form of a nonwoven fabric using needle punching by making a web of ion exchange fibers on an ion exchange nonwoven fabric, sprinkling an ion exchange resin on it, and then placing an ion exchange nonwoven fabric on it. The technology to remove acidic and alkaline ions from the clean room of the semiconductor manufacturing process has been proposed, but because the pores of the nonwoven fabric are large, it is not possible to filter out minute harmful dust, and the ion exchange resin sprayed onto the ion exchange nonwoven fabric There is a problem that can flow and become an additional source of contamination.

The present invention has been made in view of the above, the object of the present invention is to provide an adsorption membrane that can adsorb ionic foreign matter, and physically filter the foreign matter by pores to improve the adsorption performance while preserving the flow rate. There is.

Another object of the present invention is to provide an adsorption membrane that includes an adsorption member made by accumulating nanofibers containing an antimicrobial material, or obtains excellent antimicrobial properties by performing silver stitching on the membrane.

In order to achieve the above object, the adsorption membrane according to an embodiment of the present invention, the support member is provided with a plurality of first pores; And a first adsorption member stacked on the support member and having a plurality of second pores formed thereon, wherein ion exchange nanofibers are accumulated to adsorb foreign substances.

In the adsorption membrane according to one embodiment of the present invention, the support member may be a nonwoven fabric or a woven fabric.

In addition, in the adsorption membrane according to an embodiment of the present invention, the first pore size may be larger than the second pore size.

In addition, in the adsorption membrane according to an embodiment of the present invention, the ion exchange nanofibers may be cation exchange nanofibers or anion exchange nanofibers.

In addition, in the adsorption membrane according to an embodiment of the present invention, the first adsorption member is laminated on the upper surface of the support member, is laminated on the lower surface of the support member, a plurality of third pores are formed and foreign matter It may further include a second adsorption member made by accumulating the ion exchange nanofibers adsorbed.

In addition, in the adsorption membrane according to an embodiment of the present invention, the ion exchange nanofibers are cation exchange nanofibers or anion exchange nanofibers, are laminated on the first adsorption member, and a plurality of third pores are formed. The ion exchange nanofibers may further include a third adsorption member made by accumulating ion exchange nanofibers for exchanging ions of opposite polarity.

In addition, in the adsorption membrane according to an embodiment of the present invention, the nanofibers are formed by accumulating dopamine-containing nanofibers stacked on the first adsorption member and having a plurality of pores formed thereon and having a functional group for adsorbing foreign substances. It may further comprise a fibrous web.

Here, the nanofiber web is that the functional group is attached to the dopamine by one of UV irradiation, plasma treatment, acid treatment and base treatment to the web made by spinning the spinning solution mixed with the dopamine, solvent and polymer material It features. In this case, the functional group may be a negatively charged functional group or a positively charged functional group.

In addition, in the adsorption membrane according to an embodiment of the present invention, oil may be coated on the ion exchange nanofibers.

In addition, in the adsorption membrane according to an embodiment of the present invention, the thickness of the first adsorption member may be designed to be thinner than the thickness of the support member.

In addition, in the adsorption membrane according to an embodiment of the present invention, the support member, the first adsorption member and may further include a silver stitched to one of both.

Adsorption membrane for achieving another object of the present invention, the support member is provided with a plurality of first pores; A first adsorption member stacked on an upper surface of the support member and having a plurality of second pores formed therein and accumulating ion exchange nanofibers that adsorb foreign substances; And a second adsorption member stacked on an upper surface of the first adsorption member and having a plurality of third pores formed therein, wherein the second adsorption member is formed by accumulating nanofibers containing an antibacterial material.

Here, the second and third pore size may be designed smaller than the first pore size, the antimicrobial material may be a silver nano material, the second adsorption member, together with the silver nano material, fiber-forming polymer material The spinning solution prepared by dissolving in an organic solvent may be a nanofiber web structure formed by electrospinning.

According to the present invention, the ionic foreign matter is adsorbed from the ion exchange nanofibers of the adsorption member, and the foreign matter having a size larger than the pore size in the pores of the support member and the pores of the adsorption member is physically filtered to improve the adsorption efficiency of the foreign substances. There is an advantage to this.

According to the present invention, by providing a membrane formed by stacking an adsorption member having a plurality of pores made of nanofibers on a supporting member having a plurality of pores, it is possible to improve the adsorption performance while preserving the passage flow rate.

According to the present invention, by stacking the adsorption member and the support member can have an excellent handleability and strength, it is possible to implement an adsorption membrane that can be manufactured at a low cost.

According to the present invention, the nanofiber web containing the nanofibers containing the dopamine attached with the functional groups included in the membrane has an advantage of adsorbing heavy metals, bacteria, or viruses contained in the gas or liquid passing therethrough. .

According to the present invention, the membrane includes the adsorption member having a plurality of pores formed therein and the nanofibers containing the antimicrobial material accumulated therein, or the silver is sewn onto the membrane, so that the antimicrobial properties can be excellent.

According to the present invention, by providing a membrane capable of adsorption of ionic foreign matters such as heavy metals and harmful micromaterials such as dust, dust, flakes, particles, etc., it can be applied to various fields such as water treatment, air filtration, biotechnology, medical use, etc. There is this.

1 is a cross-sectional view of an adsorption membrane according to a first embodiment of the present invention,

Figure 2 is a schematic diagram illustrating the principle of adsorbing foreign matter to the adsorption member according to the present invention,

3 is a view schematically showing a state in which ion-exchange nanofibers are accumulated by electrospinning on a support member according to the present invention;

4 is a cross-sectional view of an adsorption membrane according to a second embodiment of the present invention;

5 is a cross-sectional view of an adsorption membrane according to a third embodiment of the present invention;

6 is a cross-sectional view of an adsorption membrane according to a fourth embodiment of the present invention;

7 is a cross-sectional view of an adsorption membrane according to a fifth embodiment of the present invention;

8 is a schematic plan view illustrating a state in which silver is sewn onto the adsorption membrane according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail for the practice of the present invention.

Referring to FIG. 1, the adsorption membrane 100 according to the first embodiment of the present invention includes a support member 110 having a plurality of first pores; And an adsorption member 120 stacked on the support member 110 and having a plurality of second pores formed therein and accumulating ion exchange nanofibers to adsorb foreign substances.

The adsorption membrane 100 absorbs and filters ionic foreign matter from the ion exchange nanofibers of the adsorption member 120, and is larger than the pore size in the first pores of the support member 110 and the second pores of the adsorption member 120. Physically filtering foreign matter (dust, dust, chips, particles, etc.) having a large size to improve the removal efficiency of the foreign matter.

That is, when gas or liquid passes through the adsorption membrane 100, as shown in FIG. 2, the ionic foreign matter A contained in the gas or liquid is ion exchange nanofibers 121 of the adsorption member 120. Is adsorbed at and the foreign matter (B) of a large size contained in the gas or liquid does not pass through the second pores 122 of the adsorption member 120 is trapped inside the adsorption member 120, the adsorption membrane 100 Since the foreign matter (A, B) is bound in the adsorption state (state attached to the inside of the foreign matter does not escape) inside, it is possible to increase the filtration performance of the adsorption membrane 100 of the present invention.

Here, the second pores 122 of the adsorption member 120 filters the micro-contaminants in the nano unit included in the gas or the liquid by the fine pores. That is, the adsorption member 120 made of nanofibers is adsorbed by surface filtration made in the surface layer and by deep filtration made in the inner layer.

Therefore, the adsorption membrane of the present invention is not a membrane structure of inorganic pores, but is obtained by laminating an adsorption member having a plurality of pores made of nanofibers on a supporting member having a plurality of pores, thereby adsorbing while preserving the passage flow rate. There is an advantage to excellent performance.

In addition, in the present invention, the foreign matter B having a large size contained in the gas or the liquid may not pass even in the first pores of the support member 110 and may be trapped inside the adsorption membrane 100 to further improve the adsorption capacity. In this case, the first pore size of the support member 110 is preferably larger than the size of the second pore 122 of the adsorption member 120.

The support member 110 serves as a passage through which a gas or a liquid can pass by the plurality of first pores provided therein, and serves as a support layer supporting the adsorption member 120 to maintain a flat plate shape. Here, the support member 110 is preferably a nonwoven or woven fabric.

The nonwoven fabric that can be used may be any one of a melt-blown nonwoven fabric, a spun bond nonwoven fabric, a thermal bond nonwoven fabric, a chemical bond nonwoven fabric, and a wet-laid nonwoven fabric. 40-50 μm, and the pore size may be 100 μm or more.

In addition, in the present invention, since the adsorption member 120 formed by accumulating ion exchange nanofibers is poor in handling and strength, the adsorption membrane having excellent handleability and strength is formed by stacking the adsorption member 120 and the support member 110. Can be implemented.

On the other hand, since the adsorption member 120, which is obtained by accumulating ion exchange nanofibers, is expensive, and implements the adsorption membrane of the present invention only by the sole adsorption member 120, a large manufacturing cost is required. Therefore, in the present invention, the manufacturing cost can be reduced by stacking a support member that is much cheaper than the adsorption member 120 formed by accumulating ion exchange nanofibers with the adsorption member 120. At this time, the expensive adsorption member 120 is thin, the low-cost support member 110 is designed to be thick, it is possible to optimize the manufacturing at a low cost.

In the present invention, the ion exchange solution may be electrospun to release the ion exchange nanofibers to the support member, and the released ion exchange nanofibers may be accumulated on the support member 110 to manufacture the adsorption member 120.

An ion exchange solution may be defined as a solution in which a polymer, a solvent and an ion exchange functional group are synthesized by a synthetic process such as bulk polymerization.

Since the ion exchange functional groups are contained in the ion exchange nanofibers, ionic foreign substances such as heavy metals contained in the gas or liquid passing through the adsorption membrane 100 are exchanged by substitution and adsorbed to the ion exchange functional groups. As a result, the ionic foreign matter is adsorbed onto the ion exchange nanofibers by the ion exchange functional group.

For example, when the ion exchange functional group is SO ₃ H, NH ₄ CH ₃ , the ionic foreign matter (heavy metal cation or heavy metal anion in ionic state) contained in the water is exchanged by substitution with H ⁺ , CH ₃ ⁺ to exchange the ion exchange functional group. Is adsorbed on.

Here, the ion exchange functional group may be a cation exchange functional group selected from sulfonic acid group, phosphoric acid group, phosphonic group, phosphonic group, carboxylic acid group, asonic group, selinonic group, imino diacetic acid group and phosphate ester group; Or an anion exchange functional group selected from quaternary ammonium groups, tertiary amino groups, primary amino groups, imine groups, tertiary sulfonium groups, phosphonium groups, pyridyl groups, carbazolyl groups and imidazolyl groups.

Herein, the polymer is capable of electrospinning, and is not particularly limited as long as it can be dissolved in an organic solvent for electrospinning and can form nanofibers by electrospinning. For example, polyvinylidene fluoride (PVdF), poly (vinylidene fluoride-co-hexafluoropropylene), perfuluropolymer, polyvinylchloride, polyvinylidene chloride or copolymers thereof, polyethylene glycol di Polyethylene glycol derivatives including alkyl ethers and polyethylene glycol dialkyl esters, poly (oxymethylene-oligo-oxyethylene), polyoxides including polyethylene oxide and polypropylene oxide, polyvinylacetate, poly (vinylpyrrolidone- Vinyl acetate), polystyrene and polystyrene acrylonitrile copolymers, polyacrylonitrile (PAN), polyacrylonitrile copolymers including polyacrylonitrile methyl methacrylate copolymers, polymethyl methacrylate, polymethyl methacrylate Acrylate copolymers or mixtures thereof.

The polymers that can be used are polyamide, polyimide, polyamideimide, poly (meth-phenylene isophthalamide), polysulfone, polyetherketone, polyetherimide, polyethylene terephthalate, polytrimethylene terephthalate, polyethylene Aromatic polyesters such as naphthalate, polytetrafluoroethylene, polydiphenoxyphosphazene, polyphosphazenes such as poly {bis [2- (2-methoxyethoxy) phosphazene]}, polyurethanes and polyethers Polyurethane copolymers including urethane, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate and the like.

Preferred polymers for the adsorption member in the present invention are PAN, polyvinylidene fluoride (PVdF), polyester sulfone (PES: Polyester Sulfone), polystyrene (PS) alone, or polyvinylidene fluoride (PVdF) and poly Acrylonitrile (PAN) may be mixed, or PVdF and PES, PVdF and thermoplastic polyurethane (TPU) may be mixed and used.

The solvent may be a monocomponent solvent, for example, dimethylformamide (DMF), but in the case of using a bicomponent solvent, a two-component system in which a boiling point (BP) is mixed with a high boiling point is low. Preference is given to using a solvent.

As described above, in the adsorption member 120 in which the ion exchange nanofibers are accumulated in the support member 110, a plurality of ultra-fine pores (ie, second pores) are formed between the ion exchange nanofibers that are randomly accumulated. It is preferable that this ultrafine pore size is 3 micrometers or less.

And the diameter of the ion-exchange nanofibers is preferably in the range of 0.1 ~ 3.0㎛, the adsorption member 120 is freely adjusted according to the time radiated from the electrospinning apparatus, the pore according to the thickness of the adsorption member 120 The size is determined.

In addition, the ion exchange nanofibers may be defined as having ion exchange functional groups with ion exchange ability on the surface, and the ion exchange nanofibers may be cation exchange nanofibers or anion exchange nanofibers depending on the ions exchanged by the ion exchange functional groups. have.

The adsorption member 120 formed by accumulating ion exchange nanofibers becomes a web structure of ion exchange nanofibers, and the web is ultra thin and ultra light, and has a specific surface area.

In the present invention, by electrospinning to accumulate the ion exchange nanofibers in the support member 110 to form the adsorption member 120, by increasing the bonding force between the support member 110 and the adsorption member 120 to be adsorbed by the external force There is an advantage that can prevent the member 120 from being peeled from the support member 110.

That is, as shown in FIG. 3, the ion exchange nanofibers 121 discharged from the spinning nozzle 210 of the electrospinning apparatus are stacked on the support member 110, and the stacked ion exchange nanofibers 121 are accumulated to form a web. Adsorption member 120 of the form is formed.

4 to 7 are cross-sectional views of adsorption membranes according to the second to fifth embodiments of the present invention.

Referring to FIG. 4, the adsorption membrane according to the second embodiment of the present invention includes a support member 110 having a plurality of first pores; A first adsorption member (120a) stacked on an upper surface of the support member (110) and having a plurality of second pores formed thereon and accumulating ion exchange nanofibers that adsorb foreign substances; And a second adsorption member (120b) stacked on a lower surface of the support member (110) and having a plurality of third pores formed therein, and in which ion exchange nanofibers adsorbing foreign matter are accumulated. .

In the adsorption membrane according to the second embodiment, the first and second adsorption members 120a and 120b are stacked on both surfaces of the support member 110, and thus, the ionic foreign matter and the first adsorption member 120a that are not adsorbed by the first adsorption member 120a. Since foreign matter having a size larger than the three pore sizes can be adsorbed by the second adsorption member 120b, the adsorption efficiency of the foreign matter can be increased.

Here, the first pore size may be designed to be the largest, the second pore size may be designed to be an intermediate, and the third pore size may be designed to be the smallest.

Referring to FIG. 5, the adsorption membrane according to the third embodiment of the present invention includes a support member 110 having a plurality of first pores; A first adsorption member (120c) stacked on an upper surface of the support member (110) and having a plurality of second pores formed therein and accumulating first ion exchange nanofibers that adsorb foreign substances; And a second adsorption member (120d), which is stacked on the first adsorption member (120c), has a plurality of third pores, and is formed by accumulating second ion exchange nanofibers that adsorb foreign substances. It is characterized by.

The first ion exchange nanofibers of the first adsorption member 120c may be cation exchange nanofibers or anion exchange nanofibers, and the second ion exchange nanofibers of the second adsorption member 120d may be combined with the first ion exchange nanofibers. Nanofibers that exchange ions of opposite polarity. That is, when the first ion exchange nanofiber is a cation exchange nanofiber, the second ion exchange nanofiber is an anion exchange nanofiber.

Therefore, the adsorption membrane of the third embodiment has the advantage of adsorbing both the cationic heavy metal and the anionic heavy metal contained in the gas or liquid passing through the first and second adsorption members 120c and 120d.

Referring to FIG. 6, the adsorption membrane according to the fourth embodiment of the present invention includes a support member 110 having a plurality of first pores; A first adsorption member (120) stacked on an upper surface of the support member (110) and having a plurality of second pores formed thereon and accumulating ion exchange nanofibers that adsorb foreign substances; And a second adsorption member 130 stacked on an upper surface of the first adsorption member 120 and having a plurality of third pores formed therein, wherein the nanofibers containing the antimicrobial material are accumulated. do.

The adsorption membrane according to the fourth embodiment may adsorb ionic foreign matter from the ion exchange nanofibers of the first adsorption member 120, and antibacterial properties by the nanofibers containing the antibacterial material of the second adsorption member 130. Can have

Here, the second and third pore sizes are preferably designed smaller than the first pore size.

In addition, the adsorption membrane can also physically filter foreign matter having a size larger than the pore size in the first to third pores and adsorb it therein.

Here, the antimicrobial material is preferably a silver nano material. Here, the silver nano material is silver (Ag, silver) metal salt such as silver nitrate (AgNO ₃ ), silver sulfate (Ag ₂ SO ₄ ), silver chloride (AgCl).

In the present invention, a silver nano-material is dissolved in an organic solvent together with a fiber-forming polymer material to prepare a spinning solution, and the spinning solution is electrospun and the second adsorption of the nanofiber web structure made by accumulating nanofibers containing antimicrobial material The member 130 may be implemented.

In the adsorption membrane according to the fifth embodiment of the present invention, a plurality of pores are formed in the adsorption membrane of the above-described embodiments of the present invention, and dopamine-containing nanofibers having a functional group for adsorbing foreign substances are accumulated. It may further comprise a nanofiber web made. Here, the nanofiber web containing dopamine is preferably laminated on the adsorption member.

For example, as shown in Figure 7, the adsorption membrane has a plurality of pores are formed between the first and second adsorption member (120a, 120b) and the dopamine-containing nanofibers are attached to a functional group for adsorbing foreign matter It can be implemented through the nanofiber web 150 is made to accumulate.

Here, the first and second adsorption members 120a and 120b are adsorption members in which a plurality of pores are formed and ion exchange nanofibers that adsorb foreign substances are accumulated, and the nanofiber web 150 is a dopamine monomer or polymer, It is a nanofiber web made by spinning a spinning solution mixed with a solvent and a polymer material.

Dopamine (DOPAMINE; 3,4-dihydroxyphenylalamine) has a structure in which -NH ₂ and -OH are bonded to a benzene ring.

The functional groups attached to the dopamine contained in the nanofibers may be formed by a post-treatment process such as UV irradiation, plasma treatment, acid treatment, and base treatment after forming the nanofiber web containing the dopamine monomer or polymer. Dopamine-containing nanofiber webs are in a state where functional groups are attached to the nanofibers.

Here, the functional group may be a negatively charged functional group such as SO ₃ H ⁻ or a positively charged functional group such as NH ₄ ^+, and may perform a function of adsorbing heavy metals, bacteria, and viruses, such that the adsorptive membrane of the fifth embodiment of the present invention is passed through Alternatively, heavy metals, bacteria and viruses contained in the liquid may be filtered and adsorbed inside the adsorption membrane.

8 is a schematic plan view illustrating a state in which silver is sewn onto the adsorption membrane according to the present invention.

In the present invention, by performing a silver lock on the adsorption membrane of the embodiments including the support member, it is possible to implement an adsorption membrane having antibacterial properties by the stitched silver. Here, the silver sewn may be performed on one of the support member, the adsorption member and both of the adsorption membrane.

At this time, if the adsorption member of the adsorption membrane has a significantly lower strength than the support member and locks the silver to the adsorption member, the adsorption member may be damaged by the sewn silver.

On the other hand, the support member has a strength capable of withstanding the silver sewn, as shown in FIG. 8, sewn the silver 310 to the support member 110. In this case, the silver 310 is preferably sewn in a lattice pattern, but is not limited thereto.

The silver is a thread made of silver, and the silver sewn on the support member 110 may kill bacteria contained in the gas or liquid passing through it, and the adsorption membrane may have strong antibacterial properties.

Meanwhile, in the present invention, an oil such as glycerin may be coated on the nanofibers of the adsorption member of the adsorption membrane of the aforementioned embodiments.

Since the adsorption member is in the form of a web in which ion-exchange nanofibers are accumulated, in order to activate the adsorption of ion-exchange functional groups on the surface of the ion-exchange nanofibers, the nanofibers are coated with oil to adsorb ionic foreign matter onto the oil, Is adsorbed to the exchange functional groups.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

The present invention can be applied to the adsorption membrane which can adsorb ionic foreign matters by the adsorption member in which the ion exchange nanofibers are accumulated, and can be physically adsorbed by the pores to improve the adsorption efficiency and obtain excellent antibacterial properties. .

Claims (16)

A support member having a plurality of first pores; And And a first adsorption member stacked on the support member, wherein a plurality of second pores are formed and ion exchange nanofibers accumulate to adsorb foreign substances. The adsorptive membrane of claim 1, wherein the support member is a nonwoven fabric or a woven fabric. 2. The adsorptive membrane of claim 1, wherein said adsorption membrane is larger than said first pore size. The membrane of claim 1, wherein the ion exchange nanofibers are cation exchange nanofibers or anion exchange nanofibers. The method of claim 1, wherein the first adsorption member is laminated on the upper surface of the support member, A plurality of third pores are formed and is formed by accumulating ion-exchange nanofibers that adsorb foreign substances, the adsorption membrane further comprises a second adsorption member laminated on the lower surface of the support member. The method of claim 1, wherein the ion exchange nanofibers are cation exchange nanofibers or anion exchange nanofibers, And a third adsorption member stacked on the first adsorption member, wherein a plurality of third pores are formed, and the ion exchange nanofibers are formed by accumulating ion exchange nanofibers for exchanging ions of opposite polarity with the ion exchange nanofibers. Adsorption membrane. The nanofiber web according to claim 1, further comprising a nanofiber web stacked on the first adsorption member, wherein a plurality of pores are formed and dopamine-containing nanofibers are accumulated in which a functional group for adsorbing foreign substances is accumulated. Adsorption membrane. The method of claim 7, wherein the nanofiber web is functional group to the dopamine by any one of UV irradiation, plasma treatment, acid treatment and base treatment to the web made by the electrospinning of the spinning solution mixed with the dopamine, the solvent and the polymer material Adsorption membrane, characterized in that attached. 8. The adsorptive membrane of claim 7, wherein the functional group is a negatively charged functional group or a positively charged functional group. The adsorption membrane of claim 1, wherein a thickness of the first adsorption member is thinner than a thickness of the support member. The adsorption membrane of claim 1, wherein at least one of the support member and the first adsorption member further includes a stitched silver yarn. The adsorption membrane of claim 1, wherein an oil is coated on the ion exchange nanofibers. A support member having a plurality of first pores; A first adsorption member stacked on an upper surface of the support member and having a plurality of second pores formed therein and accumulating ion exchange nanofibers that adsorb foreign substances; And And a second adsorption member stacked on an upper surface of the first adsorption member and having a plurality of third pores formed therein, wherein the second adsorption member is formed by accumulating nanofibers containing an antimicrobial substance. The membrane of claim 13 wherein the size of the second and third pores is smaller than the size of the first pores. The adsorptive membrane of claim 13, wherein the antimicrobial material is a silver nano material. The membrane of claim 15, wherein the second adsorption member comprises a nanofiber web formed by electrospinning a spinning solution prepared by dissolving the silver nanomaterial and the fiber-forming polymer material in an organic solvent.

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